overview, user_filt
*Conan The Librarian (sorry for the slow response - running on an old VAX)
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Library /sys$common/syshlp/dtm$dw_helplib.hlb overview, user_filt *Conan The Librarian (sorry for the slow response - running on an old VAX) |
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The user defined filter facility provides a mechanism
whereby filters written as DEC Text Processing Utility
(DECTPU) programs are automatically executed when tests
are run. These filters are referred to as user filters.
The implementation enables users to solve easily many
filtering problems, often with a single-line program,
whilst allowing full access to the facilities of DECTPU
to solve more complex cases.
To implement a new filter, a file containing the
required DECTPU commands is created. There are a
number of predefined patterns and a global replace
procedure provided which can be used to build the
commands. For example, the following command will
replace device names that precede a directory with
the string "DEVICE":
global_replace( identifier + ':[' , 'DEVICE:[' )
Procedure global_replace is similar to the TPU pattern
style feature of Compaq Language-Sensitive Editor and
filters can be developed using that facility.
To associate a user filter with a test, a logical
variable starting with the characters "DTM$UF_"
is created. The value of the variable is the file
specification of the file containing the DECTPU
commands.
The variable is then associated with the test in the
usual way.
When the test is run, as part of a collection, the
filter will be applied.
Additional Information (explode) :
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